- 您現在的位置：買賣IC網 > PDF目錄373995 > ADM1052 (Analog Devices, Inc.) Precision Dual Voltage Regulator Controller PDF資料下載
參數資料
| 型號： | ADM1052 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Precision Dual Voltage Regulator Controller |
| 中文描述： | 精密雙穩壓控制器 |
| 文件頁數： | 8/8頁 |
| 文件大小： | 164K |
| 代理商： | ADM1052 |
REV. A
–8–
C
P
ADM1052
ADM1052
100 F
2
100 F
3.3V
V
OUT1
FORCE 1
SENSE 1
3.3V
V
OUT2
FORCE 2
SENSE 2
100 F
2 100 F
SHDN1
SHDN2
LEAVE OPEN OR
CONNECT TO
LOGIC SIGNALS
IF SHUTDOWN
REQUIRED
1 F
12V
V
CC
GND
Figure 4. Typical Application Circuit
SUPPLY DECOUPLING
The supply to the drain of an external MOSFET should be decoupled
as close as possible to the drain pin of the device, with a 100
μ
F
capacitor to ground. The output from the source of the MOSFET
should be decoupled as close as possible to the source pin of the
device. Decoupling capacitors should be chosen to have a low
Equivalent Series Resistance (ESR). With the MOSFETs specified
and two 100
μ
F capacitors in parallel, the circuit will be stable for
load currents up to 2 A. The V
CC
pin of the ADM1052 should be
decoupled with a 1
μ
F capacitor to ground, connected as close as
possible to the V
CC
and GND pins.
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
8-Lead Small Outline Package
(Narrow Body, SO-8)
0.0098 (0.25)
0.0075 (0.19)
0.0500 (1.27)
0.0160 (0.41)
8
0
0.0196 (0.50)
0.0099 (0.25)
45
8
5
4
1
0.1968 (5.00)
0.1890 (4.80)
0.2440 (6.20)
0.2284 (5.80)
PIN 1
0.1574 (4.00)
0.1497 (3.80)
0.0500 (1.27)
BSC
0.0688 (1.75)
0.0532 (1.35)
SEATING
PLANE
0.0098 (0.25)
0.0040 (0.10)
0.0192 (0.49)
0.0138 (0.35)
In practice, the amount of decoupling required will depend on
the application. PC motherboards are notoriously noisy environ-
ments, and it may be necessary to employ distributed decoupling
to achieve acceptable noise levels on the supply rails.
CHOICE OF MOSFET
As previously discussed, the load current at which an output
goes into hiccup mode depends on the on-resistance of the
external MOSFET. If the on-resistance is too low this current
may be very high. While the Test Circuit (Figure 1) shows the
use of the lower resistance PHD55N03LT from Philips on
Channel 1 and the use of the higher resistance MTD3055VL
from Motorola on Channel 2, the MTD3055VL is, in fact,
suitable for both channels. Similarly, the PHB11N06LT from
Philips is also suitable for both channels.
THERMAL CONSIDERATIONS
Heat generated in the external MOSFET must be dissipated
and the junction temperature of the device kept within accept-
able limits. The power dissipated in the device is, of course, the
drain-source voltage multiplied by the load current. The required
thermal resistance to ambient is given by
J
A
=
T
J
(
MAX
)
–
T
AMB
(
MAX
)
/(
V
DS
(
MAX
)
×
I
OUT
(
MAX
)
)
Surface-mount MOSFETs such as those specified must rely on
heat conduction through the device leads and the PCB. One
square inch of copper (645 sq. mm) gives a thermal resistance of
around 60
°
C/W for a SOT-223 surface-mount package and
80
°
C/W for a SO-8 surface-mount package.
For higher power dissipation than can be accommodated by a
surface-mount package D
2
PAK or TO-220 devices are recom-
mended. These should be mounted on a heatsink with a thermal
resistance low enough to maintain the required maximum junc-
tion temperature.
相關PDF資料 |
PDF描述 |
|---|---|
| ADM1052JR | Precision Dual Voltage Regulator Controller |
| ADM1060 | DIP Socket; No. of Contacts:56; Pitch Spacing:0.07"; Row Spacing:0.6"; Terminal Type:PC Board; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):No RoHS Compliant: Yes |
| ADM1060ARU | CON-HDR64POS2ROW 4WALL.1X.1SP,RTANG,LOPF |
| ADM1064 | Super Sequencer with Voltage Readback ADC |
| ADM1064ACP | Super Sequencer with Voltage Readback ADC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM1052JR | 制造商:Analog Devices 功能描述:DC DC Cntrlr Dual-OUT Prog Sw 3.3V Input 8-Pin SOIC 制造商:Rochester Electronics LLC 功能描述:DUAL BUS TERMINATOR - Bulk |
| ADM1052JR-REEL | 制造商:Analog Devices 功能描述:DC DC Cntrlr Dual-OUT Prog Sw 3.3V Input 8-Pin SOIC T/R 制造商:Rochester Electronics LLC 功能描述:DUAL BUS TERMINATOR - Tape and Reel |
| ADM1052JR-REEL7 | 制造商:Analog Devices 功能描述:DC DC Cntrlr Dual-OUT Prog Sw 3.3V Input 8-Pin SOIC T/R |
| ADM1060 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Communications System Supervisory/Sequencing Circuit |
| ADM1060ARU | 功能描述:IC SUPERVIS/SEQUENC 7-CH 28TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監控器 系列:Super Sequencer® 標準包裝:1 系列:- 類型:簡單復位/加電復位 監視電壓數目:1 輸出:開路漏極或開路集電極 復位:高有效 復位超時:- 電壓 - 閥值:1.8V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-TSOP（0.059"，1.50mm 寬）5 引線 供應商設備封裝:5-TSOP 包裝:剪切帶 (CT) 其它名稱:NCP301HSN18T1GOSCT |
發布緊急采購，3分鐘左右您將得到回復。